Question

I searched a lot in google but not able to get the answer required. I am choosing photos from the image gallery and I want to store it in my application. If I have to store it in database(As BLOB), then I have to enter the name of the file(which I am not getting as I have chosen from the gallery). Can I store it anywhere else? please help. I am stuck in this from a long time. I need to extract the image and show it in map calloutview.

I am using the below code to choose photo from gallery and insert into the database

 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)dictionary {
        [picker dismissModalViewControllerAnimated:YES];
    tempImg.image = image;
    NSData *imgData = UIImagePNGRepresentation(tempImg.image);
        NSLog(@"the img data %@",imgData);

sql = [NSString stringWithFormat:@"update latlng set image = '%@' where placeName = '%@'",imgData,pName.text];

The below code excuting the sql statement mentioned above

if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) {
        const char *sqlStatement;
        sqlStatement = [sql UTF8String];;

        sqlite3_stmt *compiledStatement;
        if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) 
        {
            if (sqlite3_step(compiledStatement))
            {
                NSLog(@"YES");
            }
        }
        else 
        {
            printf( "could not prepare statemnt: %s\n", sqlite3_errmsg(database));
        }
        sqlite3_finalize(compiledStatement);

    }sqlite3_close(database);

The below code to extract from database

NSData *data = [[NSData alloc] initWithBytes:sqlite3_column_blob(compiledStatement, 5) length:sqlite3_column_bytes(compiledStatement, 5)];

the below code to display the image in callout

UIImageView *mapImg = [[UIImageView alloc] initWithImage [UIImageimageWithData:imgData]];
pinView.leftCalloutAccessoryView = mapImg;

Answer 1

Convert the image obtained for photo gallery to NSData and then save it in database as a Blob,So you can easily retrieve the nsdata from database when ever you needed.

NSData *image1Data = UIImagePNGRepresentation(image1.image);
sqlite3_bind_blob(init_statement, 1, [image1Data bytes], [image1Data length], NULL);

image1 is the ImageView where i am displaying the image from the photo gallery.

All the best.